. >> suarez: and vice president joe biden told the mayors not to believe the voices of doubt. >> there are some who say the most powerful voice in this debate belongs to the gun lobby and those that demand a stop to these common sense approaches to save lives. i think they're wrong. this time, this time will not be like times that have come before. >> suarez: and away from washington in aurora, colorado-- the movie theater where 12 people were killed last july, reopened this evening, with a ceremony for the victims. >> brown: we look at the realities of these proposals now from two experts. adding new psychologists to schools, asking teachers to help identify which students may need mental health treatment and making it easier for states to make information about individuals with mental illnesses available to the background check system. dr. paramjit joshi is director of psychiatry at the children's national medical center in washington, d.c. and the president-elect of the american academy of child and adolescent psychiatry. she has taught and published and barry rosenfeld is professor